Lost Communication With Hybrid Start-Stop Module
The U0293 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Hybrid Start-Stop Module. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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Common Symptoms
- Auto start-stop not functioning
- Engine not shutting off at red lights
- Start-stop indicator showing fault
- Higher than normal fuel consumption at idle
Probable Causes (Ranked by Likelihood)
- Failed start-stop control module Very High
- Weak auxiliary battery preventing restart High
- CAN bus communication fault Moderate
- Starter motor wear Low
Step-by-Step Diagnostic Procedure
-
Test auxiliary battery condition
-
Scan start-stop module for codes
-
Check starter motor operation
-
Verify CAN bus at start-stop module
Frequently Asked Questions
Can I drive with U0293?
Yes. The engine just will not turn off at stops. Fuel economy decreases slightly.
What causes U0293?
Most commonly a weak battery that cannot reliably restart the engine.
How much does U0293 cost to fix?
Typically $200 to $800. Battery replacement is usually the cheapest fix.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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